Structured data that uses the Schema.org vocabulary to describe entities and page content.
A practical example
A page can identify an organisation and its contact details using relevant JSON-LD properties.
What to watch for
Use accurate information that matches visible content. Schema.org vocabulary and search-provider rich-result support are not the same thing.
Related reading
Explore Structured Data and Rich Results. Try our noindex checker for a practical next step. See how this fits into Technical SEO.